Hi OP,
I have just skimmed the other posts so apologies if I repeat anything that has already been said.
Many people who have had their gallbladder removed develop Bile Reflux - (I have it, but I still have my GB, mine is due to a faulty pyloric valve).
Different things work for different people, but if you continue to suffer from a bad tummy, weird abdominal pains (which can go up your sides and even up your back) and heartburn I highly recommend doing a month-long elimination diet as certain foods and drink make it worse.
On top of that, I take carafate (also called sucralfate), which I don't think is available in the UK at the moment due to a shortage apparently (worth checking!), but I'm sure there's an equivalent. I also take two psyllium husk powder capsules (you can get from Holland & Barrett, etc). which basically mops up the excess bile.
Like most things, stress makes it worse too so yoga, meditation, light exercise, etc. help.
There is a great support group on FB that someone on here recommended to me and it has really helped - it's called Bile Reflux Support Group. They are really supportive - most of them have had their GBs removed.
Hopefully your pains are just due to still healing from the op, but feel free to PM me if you have any Qs.